SN 2021zny: an early flux excess combined with late-time oxygen emission suggests a double white dwarf merger event

Georgios Dimitriadis, Kate Maguire, Viraj R. Karambelkar +28

We present a photometric and spectroscopic analysis of the ultra-luminous and slowly evolving 03fg-like Type Ia SN 2021zny. Our observational campaign starts from $\sim 5.3$ hours a…